From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagrams for valve noise tests and single valve dampers.
| Identifier | ExFiles\Box 151\2\ scan0257 | |
| Date | 19th June 1934 | |
| 25-4-34 ¢ OF STANDARD VALVE VALVE LOWERED TO LEVEL OF TRANSFER PASSAGE FIG E PIPE SOLDERED IN POSITION FIG F RESTRICTION PIPE VALVE NOISE TESTS. SINGLE VALVE DAMPERS. ROLLS-ROYCE, LTD PRINT ROOM 19 JUN 1934 DERBY. Hs {Lord Ernest Hives - Chair} 1406 2 SHEETS - SHEET II | ||